Midnight Mutants

Midnight Mutants is an action-adventure game for the Atari 7800 ProSystem, developed by Radioactive Software and published by Atari Corporation in 1990. It features a likeness of Al Lewis, dressed as Grandpa Munster, playing the role of "Grampa." The game, along with Sentinel, was one of the last releases by Atari for the Atari 7800.

As with similar games of that era, Midnight Mutants features a large in-game environment with many locations, a background musical soundtrack, battles against boss enemies and an animated introduction.